#243CBC#243CBC

#243CBC is a dark, highly saturated blue. Relative luminance 0.072; OKLCH L 43.2% C 0.201 H 267.8°. Best body text is #FFFFFF at 8.58:1 contrast (WCAG AA passes).

Color values

HEX	#243CBC
RGB	rgb(36, 60, 188)
HSL	hsl(231, 68%, 44%)
HSV	hsv(231, 81%, 74%)
CMYK	cmyk(80.9%, 68.1%, 0%, 26.3%)
CIE-LAB	lab(32.34, 38.35, -69.25)
CIE-LCH	lch(32.34, 79.16, 298.98°)
OKLab	oklab(43.2% -0.0076 -0.2006)
OKLCH	oklch(43.2% 0.201 267.8)
XYZ	xyz(11.4174, 7.2363, 48.3622)
Luminance	0.0724 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243CBC #BCA424

analogous

#2488BC #243CBC #5824BC

triadic

#243CBC #BC243C #3CBC24

tetradic

#243CBC #BC2488 #BCA424 #24BC58

square

#243CBC #BC2488 #BCA424 #24BC58

split-complementary

#243CBC #BC5824 #88BC24

monochromatic

#101B55 #1A2C89 #243CBC #425ADB #7687E5

Accessibility & contrast

On white

8.58

#243CBC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.45

#243CBC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243CBC

8.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243CBC	#FFFFFF	#000000	##FFFFFF
##243CBC	1.00	8.58	2.45	8.58
#FFFFFF	8.58	1.00	21.00	1.00
#000000	2.45	21.00	1.00	21.00
##FFFFFF	8.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053C0

Deuteranopia (green-blind)

#0045BA

Tritanopia (blue-blind)

#005F77

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #243cbc;
/* rgb */ color: rgb(36, 60, 188);
/* oklch */ color: oklch(43.2% 0.201 267.8);

Tailwind

colors: {
  custom: {
    50: '#7a72d1',
    500: '#243cbc',
    950: '#000000',
  },
}

SCSS

$custom: #243cbc;
$custom-light: #7a72d1;
$custom-dark: #000000;

JSON

{
  "hex": "#243cbc",
  "rgb": {
    "r": 36,
    "g": 60,
    "b": 188
  },
  "hsl": {
    "h": 230.526,
    "s": 67.857,
    "l": 43.922
  },
  "oklch": {
    "l": 0.43203,
    "c": 0.20077,
    "h": 267.8
  },
  "luminance": 0.07238
}

Semantic roles & 50–950 ramp

primary

#243CBC

secondary

#CCBD70

accent

#CF3DEB

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #243CBC

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →